Application of spiral CT reconstruction technique in diagnosis of orbital blowout fracture

(Objective To) study spiral CT reconstruction technique in diagnosis of orbital blowout fracture.(Methods 120) cases orbital blowout fracture were selected for spiral CT volume scan,after getting normal axial pictures,rebuilded the multiplanar and three dimensional pictures.(Results The) spiral CT multiplanar reconstruction can show each wall of the orbit.But the outside wall of the surface shaded display(SSD) manifestation orbital fracture is better.Interruption of bone continuity,fragments,the bone slice separates,depression or fall of orbital wall were direct signs of orbital blowout fracture.Tear drop sign was a characteristic sign of inferior or medial orbital wall fracture.Conclusion The spiral CT axial joining together the picture of reconstruction,can present orbital fracture and the complications clearly.